Scripts associated with shared folders must be prevented from execution in Outlook.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223349	O365-OU-000004	SV-223349r961092_rule		Medium

Description

This policy setting controls whether Outlook executes scripts associated with custom forms or folder home pages for shared folders.

STIG	Date
Microsoft Office 365 ProPlus Security Technical Implementation Guide	2025-03-05

Details

Check Text (C-25022r744258_chk)

Verify the policy for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Outlook Options >> Other >> Advanced >> Do not allow Outlook object model scripts to run for shared folders is set to "Enabled".

Use the Windows Registry to navigate to the following key:

HKCU\software\policies\microsoft\office\16.0\outlook\security

If the value for sharedfolderscript is set to REG_DWORD = 0, this is not a finding.

Fix Text (F-25010r442267_fix)

Set the policy for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Outlook Options >> Other >> Advanced >> Do not allow Outlook object model scripts to run for shared folders to "Enabled".